List of usage examples for javax.media.j3d TriangleFanArray TriangleFanArray
public TriangleFanArray(int vertexCount, int vertexFormat, int stripVertexCounts[])
From source file:ViewProj.java
public BranchGroup createVWorldViewSG() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); objRoot.setCapability(BranchGroup.ALLOW_DETACH); // setup a transform group to hold the scaled scene TransformGroup objTrans = new TransformGroup(); objRoot.addChild(objTrans);//from ww w . j a v a 2 s. co m // get the eye point, field of view and clip distances float fov = (float) view.getFieldOfView(); // figure out the angle factors to find points along the edges // of the FOV // X = fovSpreadX * (Y - eyeVW.y) + eyeVW.x; float fovSpreadX = (float) Math.tan(fov / 2); // Z = fovSpreadZ * (X - eyeVW.x) + eyeVW.z; float fovSpreadZ = 1.0f / fovSpreadX; //System.out.println("fovSpreadX = " + fovSpreadX); //System.out.println("fovSpreadZ = " + fovSpreadZ); Transform3D vpTransform = new Transform3D(); viewingPlatform.getViewPlatformTransform().getTransform(vpTransform); Vector3f vpTranslation = new Vector3f(); vpTransform.get(vpTranslation); eyePtVW.set(vpTranslation); eyePtVW.negate(); // get the eye point in our 2D coord system. Point3f eyePt = new Point3f(0.0f, eyePtVW.z, 0.1f); float frontClipDist = (float) view.getFrontClipDistance(); float backClipDist = (float) view.getBackClipDistance(); // set up the clip plane lines Point3f[] cpPoints = new Point3f[5]; cpPoints[0] = new Point3f(frontClipDist * fovSpreadX, eyePtVW.z + frontClipDist, 0.1f); cpPoints[1] = new Point3f(cpPoints[0]); cpPoints[1].x *= -1; Point3f backLeft = new Point3f(-backClipDist * fovSpreadX, eyePtVW.z + backClipDist, 0.1f); cpPoints[2] = backLeft; Point3f backRight = new Point3f(backLeft); backRight.x *= -1; cpPoints[3] = backRight; cpPoints[4] = cpPoints[0]; //for (int i = 0; i < 4; i++) { // System.out.println("cpPoints[" + i + "] = " + cpPoints[i]); //} int[] cpLength = new int[1]; cpLength[0] = 5; LineStripArray cpLines = new LineStripArray(5, LineArray.COORDINATES, cpLength); cpLines.setCoordinates(0, cpPoints); Appearance cpApp = new Appearance(); ColoringAttributes cpCa = new ColoringAttributes(blue, ColoringAttributes.SHADE_FLAT); cpApp.setColoringAttributes(cpCa); Shape3D cpShape = new Shape3D(cpLines, cpApp); objTrans.addChild(cpShape); // get the limits of the space float minY = eyePt.y; float maxY = backLeft.y; float minX = backLeft.x; float maxX = backRight.x; // figure out the X and Y extents and offsets float deltaX = maxX - minX; float deltaY = maxY - minY; float offsetX = -(maxX + minX) / 2.0f; float offsetY = -(maxY + minY) / 2.0f; float gridSize = Math.max(deltaX, deltaY); // scale the grid slightly to give a border around the edge gridSize *= 1.1f; //System.out.println("offsetX = " + offsetX); //System.out.println("offsetY = " + offsetY); // Scale the view to fit -1 to 1 Transform3D trans = new Transform3D(); trans.set(new Vector3f(offsetX, offsetY, 0.0f), 2.0f / gridSize); objTrans.setTransform(trans); // figure out a grid step that is a multiple of 10 which keeps the // number of steps less than 30. float gridStep = 1.0f; while ((gridSize / gridStep) > 30.0) { gridStep *= 10; } int gridNumSteps = (int) Math.ceil(gridSize / gridStep) + 1; // allocate the grid points array, four points for each step (x and y) // with a couple extra points for the extra grid points added // below int gridNumPoints = 4 * (gridNumSteps + 4); Point3f[] gridPts = new Point3f[gridNumPoints]; for (int i = 0; i < gridNumPoints; i++) { gridPts[i] = new Point3f(); } // find the grid limits. Add a step on each side to make sure // the grid is larger than the view float gridMinY = gridStepFloor(minY, gridStep) - gridStep; float gridMaxY = gridStepCeil(maxY, gridStep) + gridStep; float gridMinX = gridStepFloor(minX, gridStep) - gridStep; float gridMaxX = gridStepCeil(maxX, gridStep) + gridStep; //System.out.println("gridMinY = " + gridMinY); //System.out.println("gridMaxY = " + gridMaxY); //System.out.println("gridMinX = " + gridMinX); //System.out.println("gridMaxX = " + gridMaxX); // set up the background grid Appearance bgApp = new Appearance(); ColoringAttributes bgCa = new ColoringAttributes(); bgCa.setColor(grey); LineAttributes bgLa = new LineAttributes(); bgApp.setColoringAttributes(bgCa); // clear out the clip grid point list numClipGridPts = 0; // set up the vertical lines int numPts = 0; for (float x = gridMinX; x <= gridMaxX; x += gridStep) { gridPts[numPts].x = x; gridPts[numPts].y = gridMinY; gridPts[numPts].z = -0.2f; gridPts[numPts + 1].x = x; gridPts[numPts + 1].y = gridMaxY; gridPts[numPts + 1].z = -0.2f; numPts += 2; // try to add a line to the clipped grid // find the intersection of the clipped line with the FOV sides // this is a distance relative to the eye float clipZ = fovSpreadZ * Math.abs(x - eyePtVW.x); if (clipZ < frontClipDist) { // clip to front clip plane clipZ = frontClipDist; } if (clipZ < backClipDist) { // clip to back clip plane // line is not clipped clipGridPtsVW[numClipGridPts].x = x; clipGridPtsVW[numClipGridPts].y = clipZ + eyePtVW.z; clipGridPtsVW[numClipGridPts].z = -0.1f; clipGridPtsVW[numClipGridPts + 1].x = x; clipGridPtsVW[numClipGridPts + 1].y = backClipDist + eyePtVW.z; clipGridPtsVW[numClipGridPts + 1].z = -0.1f; numClipGridPts += 2; } } LineArray vertLa = new LineArray(numPts, LineArray.COORDINATES); vertLa.setCoordinates(0, gridPts, 0, numPts); Shape3D vertShape = new Shape3D(vertLa, bgApp); objTrans.addChild(vertShape); // set up the horizontal lines numPts = 0; for (float y = gridMinY; y <= gridMaxY; y += gridStep) { gridPts[numPts].x = gridMinX; gridPts[numPts].y = y; gridPts[numPts++].z = -0.2f; gridPts[numPts].x = gridMaxX; gridPts[numPts].y = y; gridPts[numPts++].z = -0.2f; // try to add a line to the clipped grid // find the intersection of the clipped line with the FOV sides // this is a distance relative to the eye float clipDist = (y - eyePtVW.z); if ((clipDist > frontClipDist) && (clipDist < backClipDist)) { float clipX = fovSpreadX * clipDist; clipGridPtsVW[numClipGridPts].x = -clipX; clipGridPtsVW[numClipGridPts].y = y; clipGridPtsVW[numClipGridPts].z = -0.1f; clipGridPtsVW[numClipGridPts + 1].x = clipX; clipGridPtsVW[numClipGridPts + 1].y = y; clipGridPtsVW[numClipGridPts + 1].z = -0.1f; numClipGridPts += 2; } } LineArray horizLa = new LineArray(numPts, LineArray.COORDINATES); horizLa.setCoordinates(0, gridPts, 0, numPts); Shape3D horizShape = new Shape3D(horizLa, bgApp); objTrans.addChild(horizShape); // draw the clipped grid. if (numClipGridPts > 0) { LineArray clipLa = new LineArray(numClipGridPts, LineArray.COORDINATES); clipLa.setCoordinates(0, clipGridPtsVW, 0, numClipGridPts); Appearance clipGridApp = new Appearance(); ColoringAttributes clipCa = new ColoringAttributes(black, ColoringAttributes.SHADE_FLAT); clipGridApp.setColoringAttributes(clipCa); LineAttributes clipGridLa = new LineAttributes(); Shape3D clipShape = new Shape3D(clipLa, clipGridApp); objTrans.addChild(clipShape); } // set up the coordinate system Appearance coordSysApp = new Appearance(); LineAttributes coordSysLa = new LineAttributes(); coordSysLa.setLineWidth(3.0f); coordSysApp.setLineAttributes(coordSysLa); ColoringAttributes coordSysCa = new ColoringAttributes(grey, ColoringAttributes.SHADE_FLAT); coordSysApp.setColoringAttributes(coordSysCa); Point3f[] coordSysPts = new Point3f[4]; coordSysPts[0] = new Point3f(gridMinX, 0, -0.5f); coordSysPts[1] = new Point3f(gridMaxX, 0, -0.5f); coordSysPts[2] = new Point3f(0, gridMinY, -0.5f); coordSysPts[3] = new Point3f(0, gridMaxY, -0.5f); LineArray coordSysLines = new LineArray(4, LineArray.COORDINATES); coordSysLines.setCoordinates(0, coordSysPts); Shape3D coordSysShape = new Shape3D(coordSysLines, coordSysApp); objTrans.addChild(coordSysShape); // set up the circle Appearance circleApp = new Appearance(); ColoringAttributes circleCa = new ColoringAttributes(); circleCa.setColor(red); circleApp.setColoringAttributes(circleCa); PolygonAttributes pa = new PolygonAttributes(); pa.setCullFace(PolygonAttributes.CULL_NONE); circleApp.setPolygonAttributes(pa); int step = 360 / (numCirclePts - 1); for (int deg = 0; deg < 360; deg += step) { double angle = Math.toRadians(deg); circlePtsVW[deg / 10].x = sphereRadius * (float) Math.sin(angle); circlePtsVW[deg / 10].y = sphereRadius * (float) Math.cos(angle); circlePtsVW[deg / 10].z = -0.3f; } circlePtsVW[numCirclePts - 1].set(circlePtsVW[0]); int[] lineStripLength = new int[1]; lineStripLength[0] = numCirclePts; //LineStripArray circleLineStrip = new LineStripArray(numCirclePts, // LineArray.COORDINATES, lineStripLength); TriangleFanArray circleLineStrip = new TriangleFanArray(numCirclePts, LineArray.COORDINATES, lineStripLength); circleLineStrip.setCoordinates(0, circlePtsVW); Shape3D circleShape = new Shape3D(circleLineStrip, circleApp); objTrans.addChild(circleShape); return objRoot; }
From source file:AppearanceExplorer.java
Shape3D createTriangleFanArray() {
int[] stripLengths = new int[1];
stripLengths[0] = 5;/* w w w . j a va 2 s.c o m*/
Point3f pnt[] = new Point3f[5];
pnt[0] = new Point3f(-1.0f, -1.0f, 0.0f);
pnt[1] = new Point3f(1.0f, -1.0f, 0.0f);
pnt[2] = new Point3f(1.0f, 0.0f, 0.0f);
pnt[3] = new Point3f(0.0f, 1.0f, 0.0f);
pnt[4] = new Point3f(-1.0f, 1.0f, 0.0f);
TriangleFanArray tfa = new TriangleFanArray(5, GeometryArray.COORDINATES, stripLengths);
tfa.setCoordinates(0, pnt);
return new Shape3D(tfa, appearance);
}
From source file:ViewProj.java
public BranchGroup createProjViewSG() { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); objRoot.setCapability(BranchGroup.ALLOW_DETACH); // setup a transform group to hold the scaled scene TransformGroup objTrans = new TransformGroup(); Transform3D scale = new Transform3D(); scale.set(0.9);// w w w .j a va2 s. co m objTrans.setTransform(scale); objRoot.addChild(objTrans); // create the clip limits line Point3f[] cpPoints = new Point3f[5]; cpPoints[0] = new Point3f(-1, -1, 0.1f); cpPoints[1] = new Point3f(1, -1, 0.1f); cpPoints[2] = new Point3f(1, 1, 0.1f); cpPoints[3] = new Point3f(-1, 1, 0.1f); cpPoints[4] = cpPoints[0]; int[] cpLength = new int[1]; cpLength[0] = 5; LineStripArray cpLines = new LineStripArray(5, LineArray.COORDINATES, cpLength); cpLines.setCoordinates(0, cpPoints); Appearance cpApp = new Appearance(); ColoringAttributes cpCa = new ColoringAttributes(blue, ColoringAttributes.SHADE_FLAT); cpApp.setColoringAttributes(cpCa); LineAttributes cpLa = new LineAttributes(); Shape3D cpShape = new Shape3D(cpLines, cpApp); objTrans.addChild(cpShape); // transform and render the clip grid points updateProjTrans(); if (numClipGridPts > 0) { // transform the clipGridPts for (int i = 0; i < numClipGridPts; i++) { projectPoint(clipGridPtsVW[i], clipGridPtsProj[i]); } LineArray clipLn = new LineArray(numClipGridPts, LineArray.COORDINATES); clipLn.setCoordinates(0, clipGridPtsProj, 0, numClipGridPts); Appearance clipGridApp = new Appearance(); ColoringAttributes clipCa = new ColoringAttributes(black, ColoringAttributes.SHADE_FLAT); clipGridApp.setColoringAttributes(clipCa); LineAttributes clipLa = new LineAttributes(); Shape3D clipShape = new Shape3D(clipLn, clipGridApp); objTrans.addChild(clipShape); } // set up the circle Appearance circleApp = new Appearance(); ColoringAttributes circleCa = new ColoringAttributes(); circleCa.setColor(red); circleApp.setColoringAttributes(circleCa); PolygonAttributes pa = new PolygonAttributes(); pa.setCullFace(PolygonAttributes.CULL_NONE); circleApp.setPolygonAttributes(pa); // transform the circlePts for (int i = 0; i < numCirclePts; i++) { projectPoint(circlePtsVW[i], circlePtsProj[i]); } int[] lineStripLength = new int[1]; lineStripLength[0] = numCirclePts; //LineStripArray circleLineStrip = new LineStripArray(numCirclePts, // LineArray.COORDINATES, lineStripLength); TriangleFanArray circleLineStrip = new TriangleFanArray(numCirclePts, LineArray.COORDINATES, lineStripLength); circleLineStrip.setCoordinates(0, circlePtsProj); Shape3D circleShape = new Shape3D(circleLineStrip, circleApp); objTrans.addChild(circleShape); return objRoot; }
From source file:GearTest.java
/** * Construct a Shaft;/* w ww .j a v a 2 s . c o m*/ * * @return a new shaft that with the specified radius centered about the * origin an laying in the XY plane and of a specified length * extending in the Z dimension * @param radius * radius of shaft * @param length * shaft length shaft extends from -length/2 to length/2 in the Z * dimension * @param segmentCount * number of segments for the shaft face * @param look * the Appearance to associate with this shaft */ public Shaft(float radius, float length, int segmentCount, Appearance look) { // The direction of the ray from the shaft's center float xDirection, yDirection; float xShaft, yShaft; // The z coordinates for the shaft's faces (never change) float frontZ = -0.5f * length; float rearZ = 0.5f * length; int shaftFaceVertexCount; // #(vertices) per shaft face int shaftFaceTotalVertexCount; // total #(vertices) in all teeth int shaftFaceStripCount[] = new int[1]; // per shaft vertex count int shaftVertexCount; // #(vertices) for shaft int shaftStripCount[] = new int[1]; // #(vertices) in strip/strip // Front and rear facing normals for the shaft's faces Vector3f frontNormal = new Vector3f(0.0f, 0.0f, -1.0f); Vector3f rearNormal = new Vector3f(0.0f, 0.0f, 1.0f); // Outward facing normal Vector3f outNormal = new Vector3f(1.0f, 0.0f, 0.0f); // Temporary variables for storing coordinates and vectors Point3f coordinate = new Point3f(0.0f, 0.0f, 0.0f); Shape3D newShape; // The angle subtended by a single segment double segmentAngle = 2.0 * Math.PI / segmentCount; double tempAngle; // Allow this object to spin. etc. this.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); /* * for the forward facing fan: ___3___ - | - / | \ 4/\ | /\2 / \ | / \ / \ | / \ : \ | / : * |--------------- *----------------| 5 0 1 * * for backward facing fan exchange 1 with 5; 2 with 4, etc. */ // Construct the shaft's front and rear face shaftFaceVertexCount = segmentCount + 2; shaftFaceStripCount[0] = shaftFaceVertexCount; TriangleFanArray frontShaftFace = new TriangleFanArray(shaftFaceVertexCount, GeometryArray.COORDINATES | GeometryArray.NORMALS, shaftFaceStripCount); TriangleFanArray rearShaftFace = new TriangleFanArray(shaftFaceVertexCount, GeometryArray.COORDINATES | GeometryArray.NORMALS, shaftFaceStripCount); coordinate.set(0.0f, 0.0f, frontZ); frontShaftFace.setCoordinate(0, coordinate); frontShaftFace.setNormal(0, frontNormal); coordinate.set(0.0f, 0.0f, rearZ); rearShaftFace.setCoordinate(0, coordinate); rearShaftFace.setNormal(0, rearNormal); for (int index = 1; index < segmentCount + 2; index++) { tempAngle = segmentAngle * -(double) index; coordinate.set(radius * (float) Math.cos(tempAngle), radius * (float) Math.sin(tempAngle), frontZ); frontShaftFace.setCoordinate(index, coordinate); frontShaftFace.setNormal(index, frontNormal); tempAngle = -tempAngle; coordinate.set(radius * (float) Math.cos(tempAngle), radius * (float) Math.sin(tempAngle), rearZ); rearShaftFace.setCoordinate(index, coordinate); rearShaftFace.setNormal(index, rearNormal); } newShape = new Shape3D(frontShaftFace, look); this.addChild(newShape); newShape = new Shape3D(rearShaftFace, look); this.addChild(newShape); // Construct shaft's outer skin (the cylinder body) shaftVertexCount = 2 * segmentCount + 2; shaftStripCount[0] = shaftVertexCount; TriangleStripArray shaft = new TriangleStripArray(shaftVertexCount, GeometryArray.COORDINATES | GeometryArray.NORMALS, shaftStripCount); outNormal.set(1.0f, 0.0f, 0.0f); coordinate.set(radius, 0.0f, rearZ); shaft.setCoordinate(0, coordinate); shaft.setNormal(0, outNormal); coordinate.set(radius, 0.0f, frontZ); shaft.setCoordinate(1, coordinate); shaft.setNormal(1, outNormal); for (int count = 0; count < segmentCount; count++) { int index = 2 + count * 2; tempAngle = segmentAngle * (double) (count + 1); xDirection = (float) Math.cos(tempAngle); yDirection = (float) Math.sin(tempAngle); xShaft = radius * xDirection; yShaft = radius * yDirection; outNormal.set(xDirection, yDirection, 0.0f); coordinate.set(xShaft, yShaft, rearZ); shaft.setCoordinate(index, coordinate); shaft.setNormal(index, outNormal); coordinate.set(xShaft, yShaft, frontZ); shaft.setCoordinate(index + 1, coordinate); shaft.setNormal(index + 1, outNormal); } newShape = new Shape3D(shaft, look); this.addChild(newShape); }